w Thong tin khoa hoc cong nghe md NGHIEN Cdu AP DUNG C O N G NGHE KHAI THAC CdT DAI THEO PHUDNG DIEU KHIEN DA VACH D A N G DAI THAN LUU TRONG DIEU KIEN VIA MONG, DOC CONG TY THAN QUANG HANH For the pu[.]
w Thong tin khoa hoc cong nghe md NGHIEN Cdu AP DUNG C O N G NGHE KHAI THAC CdT DAI THEO PHUDNG DIEU KHIEN DA VACH D A N G DAI THAN LUU TRONG DIEU KIEN VIA MONG, DOC - CONG TY THAN QUANG HANH For the purpose of mining the thin and Inclined coal TS OAO HdNG QUANG seams with the complicated geological conditions KS DAM HUY TAI at Quang Ninh coal basin Institute of Mining KS THAN VAN DUY Science and Technology (VIMSAT) has proposed Viin Khoa hge Cdng nghg Mo • Vinacomin the long pillar mining method on strike and roof rock control with the left coal belts, coal extraction by drilling and blasting method The paper introduces the fundamental nature of this mining flowsheet and its initial application results at Quang Hanh Coal Company Dk khai thde cdc vfa than die mdng din ddy trung binh, dilu kidn dja chit md thupn lyi, cde edng ty khai thde than him Id vung Quang Ninh dd dp dgng mOt so so edng nghp khai thde nhu: so edng nghd khai thde Id dpc vfa phdn tang kit hyp sCr dgng mdy khoan dudng kinh Idn (md Dong Vdng); so edng nghp khai thac chia cOt theo hudng die dp dgng eo gidi hda bang mdy bdo than kit hyp vdi ddn chlng ty hdnh 2ANSH (md Mao Khd vd Hong Thdi); Id ehy chia bpc chdn khay chong cOt thuy lyc don xd khdp hope chlng gd (md Hing Thdi) Kit qua dp dung da dat duyc mOt s l chf tidu kinh t l ky thuat t i t vd dam bao an todn lao dOng o l i vdi eac vfa mdng, doc cd dilu kidn dja chit phirc tap (gde die vfa Idn, biin dOng, dd vdch khd sap do), nhilu mo chua huy dOng phln tai nguydn vao khai thac hope cd huy dOng nhung hipu qua khai thac thap, chu y l u khai thac bang phuong phap ddo Id lay than, chi phi gia khai thac Idn, ty Id ton thit than eao, ddn d i n hipu qua khai thde khdng eao md nguyen nhdn chinh Id ehua lya ehpn duyc edng nghp khai thde phu hyp Trong dilu kidn trQ' luyng tdi nguydn da chuin bj cd hpn, phan tdi nguydn mu'c sdu chua ehuan bj kjp vd than Id nguon tdi nguydn khdng tdi tao, eIn thilt phai huy dOng trir luyng cdc vfa mdng vdo khai thde nham ddp O'ng ydu c l u tdng san luyng mang lai hipu qua vd giam ton that tdi nguydn Theo ddnh gid dac dilm dilu kipn dja chit- ky thupt md khodng sdng than vung Quang Ninh [1] ting trQ' luyng ede vfa mdng vd trung binh (din 2.2 m), doe cd dilu kipn dia chat phu'c tap, khdng t h i dp dgng edng nghd eo gidi hda khai thde tinh d i n mirc thdm dd vd lap cde dy dn khai thde khoang trdn 23 tridu tan (bang 1) Trdn co sd kit hyp kinh nghidm tir vide dp dung so edng nghd khai thde cOt ddi theo phuong Id chy chia bdc chdn khay, dilu khiin dd vdch bang chdn Id todn phan kilu Kakuchi da dp dung tai Cdng ty than Mpo Khd vd so dc edng nghd khai thde cOt dd' theo phuong, dilu khiin 6£ vdch bang dai than luu dd dp dgng tpi Trung Quoc, done thdi vdi dae dilm dilu kidr dja chit ky thupt md, Vidn Khoa Md ds ^ ^hpe Cdng ^ _ nghp _ 6k xult so edng nghd kha, thde cOt ddi theo phuong khlu than bang khoan no min, Bing Tong hgp trw Iwgng tdi nguyen than cdc via mdng, doc cd dieu kign dja chitphwc tap vung Quang Ninh G6c die via (dl) 35-55 >55 Tong cdng KHCNM S6 1/2012* CNKT HAM LO Chilu ddy via, (m) 1,21-2,2m 0,71-1,2m 14.598.100 3.340.000 62,99 14,41 4.192.800 1.045.200 18,09 4,51 18.790.900 4.385.200 81,08 18,92 Tong cong (tdn) 17.938.100 77,40 5.238.000 22,60 23.176.100 100,00 w Thong tin khoa hoc cong ngh§ m d dilu khiin dd vdch blng ddi than luu dp dgng eho dilu kipn vfa ed ehilu ddy dudi 2,5m, gde die trdn 40°, dd vdch thuOe lopi bin vCpng trung binh trd Idn Dilm ddc bipt so d l edng nghd ndy Id phuong phdp dilu khiin dd vdch bdng vipe su' dgng ede dai than luu nhdm giam dp lye md tde dOng len guong khai thde vd tpo gde die gia d l Idm giam dO d i e ehung eua Id ehy U'u dilm eua cdng nghp ndy la eho phdp khai thde dilu kidn vfa mdng vd dO die Idn Ngodi ra, edng nghd ndy it phu thuOe vdo dO biln dOng gde die vfa, thich irng tit vdi dilu kidn trir luyng tpp trung khdng eao vd ed the dp dung vdo thye t l san xult nhd su dgng cdc thilt bj vat tu san cd, khdng eIn phai d i u tu mdi Ban chit cua sa cdng nghg khai thic nhu sau: Cdng tac chuan bj: Khu vyc duyc chuin bj theo so d l edng nghd khai thac cOt ddi theo phuong khlu dpt, cdng tdc chuin bj nhu sau: Odo Id dpc vfa thdng gid vd vpn tai cho Id ehy Tir vj tri gidi han eua khu (hope cOt) khai thde, ddo Id thuyng nii giira hai Id thdng gid va vpn tai cua ting (hodc phdn ting) Idm Id thuyng khdi dilm khai thde Id ehy Dk sOf dgng Ipi Id vdn tai cua Id chy ting trdn (hole phdn ting trdn) Idm Id thdng gid cho Id chy ting dudi (hoae phdn ting dudi) ddo Id song song chdn chy cdch Id van tai ^ m v l phia tren theo ehilu die Id chy GiQ'a Id van tai vd Id song song chan ehy ddo cdc Id nii khoang cdch ede Id nii tu' -^ m d l tao Ili di Ipi len Id chy vd cung 6k thdo thu h i i than cdc ddi than luu Cdng tic khai thic: Cdng tde khai thde cdc Id chy duyc tiln hdnh theo giai doan Giai doan khlu, chlng guong Id chy vd luu than, giai doan thdo, thu hii than cdc dai than luu Cdc cdng vide thyc hi|n m l i giai doan duyc tiin hdnh nhu sau: Giai dopn 1: Khiu, chdng guong Id chg vi tuu than Ld chy duyc bit mdp vd khlu tir thuyng khdi dilm vd duyc md xidn chdo d l giam gdc d i e (tao gdc d i e gia cho Id ehy tu- 30 + 35°), chdn Id chy tiln trudc Guong Id chy duyc b l tri chia thdnh cdc bdc chdn khay vdi chilu ddi mdi doan chdn khay tir ^ 8m, khlu than blng khoan n l min, chlng giir bdng vi chlng gd thiu ngang Chilu rOng mdi mdt bdc chan khay tip 1,8-^2.4m Khi khlu than tiln hdnh n l tai cdc mdt bdc chdn khay theo hudng tip trdn xuIng dudi (theo chilu d i e vfa) Than phd tai guong mOt phln duyc tai bdt 6k tao khdng gian chlng giu- guong khlu, cdn phln Idn duyc luu lai phia lulng phd hda Vide khlu guong vd luu than phai dam bdo ehilu rOng khdng gian chlng giu- cua Id chy tip mOt d i n hai lulng khlu Trong qud trinh khlu chlng guong Id chy, Idm cdc vdch ngdn bdng hdng cOt, ho$c egm cOt, hodc cQi lyn kit hyp vdi ludi thdp d l tpo cdc dai than luu Vdch ngdn ludi duyc Idm theo chilu gdc die that cua vfa, khoang cdch giCra cac vdch ngdn theo phuong tip ^ 10m Giai dopn 2: Thao, thu hoi than cac dai than luu KHCNM S6 1/2012* CNKT HAM L Theo t i l n dO khlu guong, cdc dai than luu duyc hinh thdnh Sau tao duyc dii than luu, tiln hdnh thao thu h i i than cac dai than luu Vide thao thu hii than duyc thyc hiOn i l n luyt cho tirng dai, duli theo guong khlu Vj tri cua dai than lu-u dang thdo thu h i i each vj tri khlu guong Id chy cho ludn ludn cd cdc dai than dang luu, mOt dai than luu vd mOt dai than dang thdo Cdng vi$c thdo thu h i i than mli dai bao gIm: thdo dd cuyc chan d cdc phlng thdo than, thao thu h i i than, cuyc Ipi phlng thdo thu h i i hit than mdi dai Cdng tic dieu khien da vach bing cic dai than luv: Trong qua trinh khlu chlng guong Id chy, da vach phia sau Id chy duyc 6d bang phln than luu Sau thao thu h i i than d cac dai than luu, da vach ty sap chen l i p khoang trlng da khai thac Cdng tic vpn tai: Than khlu tip guong Id chy mpt phln duyc tai bdt trdn mdng truyt Id chy, qua phdng xuong mdng cao d Id v i n tai 6k tao khdng gian chlng giu- lulng guong, phln Idn edn Ipi ty chay hodc duyc xue tai ve phia sau Id chy 6k luu than 6a vdch Phln than duyc thu h i i qua phdng xuIng godng d Id van tai cua ede dai than luu phia sau Id chy V|it li$u, thilt bj duyc van chuyin theo dudng Id thdng gio dl cung c l p cho Id chy Cdng tic thdng gid: Thong gid cho Id chy duoc thuc hipn theo so thdng gid chung cua khu vuc Gid sach qua 16 van tai chinh len cung cap cho Id chy Gid thai tip Id chy qua w Thdng tin khoa hoc edng nghd md /\ MATCATF-F (TIL$1/50) ,